ANTIQUES ROADSHOW continues its exploration of Palm Springs, California, with a visit to nearby Pioneertown, the location for many Hollywood westerns, to discuss trophy belt buckles. At the Palm Springs Convention Center, it's a cinch that appraisers will lasso the kind of discoveries that include a costume dress literally sewn onto Marilyn Monroe for her role in the classic 1959 comedy Some Like It Hot, estimated to be worth a very hot $150,000 to $250,000.